Trolley-pole governor.



M. O. DOLSON.

TROLLEY POLE GOVERNOR.

APPLICATION FILED JAN.27,1912.

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v M. O. DOLSON.

TBOLLBY POLE GOVERNOR.

APPLIOATIONEILED JAN. 27, 1912.

1,049,292. Patented Dec. 31,1912.

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WITNESSES; INVENT OR J/Q Mafb in Dolsorp AT T ORNEY.

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MARTIN O. DOLSON, 013 LOS ANGELES, CALIFORNIA.

TROLLEY-POLE GOVERNOR.

Specification of Letters Patent.

Patented Dec. 31, 1912.

Application filed January 27, 1912. Serial No. 673,721.

To all whom it may concern:

Be it known that I, MARTIN O. DOLSON, a citizen of the United States, residing at Los Angeles, California, have invented a new and useful Trolley-Pole Governor, of which the following is a specification.

My object'is to provide automatic means for pulling down a trolley pole when it runs off the wire and my invention consists of the novel features herein shown, described and claimed.

In the drawings: Figure 1 is a fragmentary elevation of a trolley car with my invention applied thereto. Fig. 2 is a fragmentary sectional plan on the line 22 of Fig. 1. Fig. 3 is a sectional elevation upon an enlarged scale on a plane parallel with Fig. 1 and taken on the line 3-3 of Fig. 2. Fig. 4 is a fragmentary sectional elevation on the same scale as Fig. 3 and taken on the line H of Fig. 2. Fig. 5 is a crosssectional elevation upon an enlarged scale and taken upon a line 5 -5 of Fig. 2. Fig. 6 is a view analogous to Fig. 5 with additional parts broken away and showing a modification. Fig. 7 is a sectional detail on the line 77 of'Fig. 6.

In the operation of a trolley car with an overhead wire and the ordinary trolley pole and wheel, the wheel frequently runs off of the wire when the car is turning corners, crossing or switching and then the pole flies up and does more or less damage by slamming around among the guy wires and other obstructions. In order to steady the pole to some extentand provide means of pulling the pole down, a rope is provided, the upper end of the rope being attached to the trolley pole and the lower end of the rope being wound upon a spring actuated drum, the tension of the spring serving to take up the slack in the rope.

In carrying out the principles of my invention I provide means so that when the trolley wheel leaves the wire and the pole flies up, a clutch is actuated to turn on the compressed air to the piston and the operation of the piston supplies power to the winding drum and pulls the trolley pole down.

Referring to the drawing in detail, the car 1 is provided with the usual spring acthe pipe 17 to the blowofl' is released the valve 19 -wardly and allow the pressure from the 'tuated trolley pole 2 having the usual grooved wheel 3 for running on the trolley wire 4. A rope 5 is attached at its upper end to the upper end of the trolley pole 2 and the lower end of the rope is wound upon the drum 6. The shaft 7 is mounted rigidly in the frame casing 8 and the winding drum 6 runs loosely upon the shaft. The spring 9 is mounted in the spring casinglO and said spring casing is attached to the winding drum 6. The spring 9 is of the clock spring type, its outer end bein connected to the casing 10 and its inner en being connected to the shaft 7 and the tension of the spring serves to wind the trolley rope 5 upon the drum 6 to take up the slack. An internal ratchet wheel 11 is mounted loosely upon the shaft 7 against the spring casing 10 and the centrifugal pawls 12 are pivotally mounted upon the outer face of the spring casing 10 so that when the spring casing flies around the pawls will fly outwardly and engage the teeth of the ratchet wheel 11 thereby connecting the ratchet wheel 11 to the winding drum 6; A disk 13 is loosely mounted on the shaft 7 and pressed against the hub of the internal ratchet wheel 11 by the spring washer 14, the pressure of the spring being sufficient to rotate the disk 13 when the ratchet wheel 11 is rotated. A valve casing 15 is mounted below the shaft 7 as shown in Fig. 4, said casing having an inlet port at the bottom into which the pipe 16 is connected, the other end of said pipe being connected to the compressed air .of the air brake system and having an outlet pipe 17 leading from the bottom of one side to the blow off port 18 above the pipe 17. A slide valve 19 fits in the valve casing 15 for vert-icalreciprocation and has a port 20 which connects port 18 when the valve 19 is down as in Fig. 4. The valve stem 21 connects with the valve 19 and extends through the stuffing box 22. The pitman rod or link 23 connects the valve stem 21 to the disk 13 so that when the disk 13 is rotated the valve 19 is raised to allow the compressed air to flow from the pipe 16 to the pipe 17 and so that when the disk 13 will move downpipe 17 to escape through the blowofl 18. A pinion 24 is loosely mounted upon the shaft 7 and a disk 25 is formed rigid with this pinion.v A second internal ratchet 26 is formed rigid with the Winding drum 6 and centrifugal pawls 27 are pivotally mounted upon a disk- 25 so that/when the awls fly outwardly they will engage the teeth 28 of the ratchet wheel 26. A piston cylinder 29 is mounted vertically below the 8 and a piston 30 is mounted in the frame piston cylinder. The gear rack 31 is connected to the piston 30 and engages the pinion 24. A guide roller 32 serves to hold;

7 piston cylinder 29 below the piston 30, causing the piston 30- to shoot upwardly throwing the pawls 27 into engagement with the internal ratchet 26 thereby rotating the winding drum 6 to wind the rope and hold the trolley pole downwardly. Before the operator manipulates the trolley pole 2, he operates the handle 33 to lower the valve 19 thereby shutting OK the compressed air from the piston cylinder 29 and allowing the pressure to escape; then the rack 31 will descend and the pawls 27 will assume their normal positions.

In the modification shown in Figs. 6 and 7 I have provided a winding drum 34 and chain 35 wound upon the drum 34 and a piston rod 36 to take the place of the pinion 24 and the rack 31. A counter balancing spring 37 connects the drum 34 to the shaft 7, the tension of the spring being exerted to wlnd up the chain 35 when the pressure is released.

The frame 8 forms a casing rigid with the supporting mechanism and covering onehalf, the other half being covered by a hinged cap 38. The trolley rope 5 passes through an opening 39, one-half of said opening being in the rigid frame 8 and the other half being in the cap 38.

The details of construction may be varied without departing from the spirit of my invention as set up in the following claims.

I claim:

1. A trolley pole governor comprising, a shaft rigidly mounted; a winding drum loosely mounted upon the shaft and adapted to receive the trolley rope; a spring connecting the winding drum to the shaft, the tension of the spring being exerted to take.

up the slack in the trolley rope; a compressed air supply; a valve mechanism connected to the compressed air supply; an internal ratchet wheel mounted loosely beside the drum; centrifugal pawls carried by the spring mechanism, so that when the spring flies around the pawls will engage the internal ratchet wheel, thereby connecting the ratchet wheel to the winding drum;

a disk loosely mounted; a spring washer pressing the disk against the internal ratchet 'wheel; a pitman connecting the disk to the valve mechanism so that when the trolley wheel leaves the wire and spins the winding drum, the valve mechanism'is operated to turn on the compressed air; a pinion loosely mounted; a disk carried by the pinion; a second internal ratchet rigid with the winding drum; centrifugal pawls carried by the disk in position to engage the internal ratchet; piston mechanism; and a gear rack connected to the piston mechanism and meshing with the pinion so that when the compressed air is turned on by the trolley wheel flying off the wire the piston is operated to rotate the pinion thereby rotating the winding drum and pulling the trolley pole down. 7 i

2. A trolley pole governor comprising, a

shaft rigidly mounted; a winding drum loosely mounted upon the shaft, a trolley rope being connected to and wound upon the winding drum; a spring casing'rigid with the winding drum; a spring in the spring casing, one end of the springbeing connected to the shaft and the other end being connected to the casing, the tension of the spring serving to wind the trolley rope upon the drum to take up the slack; an internal ratchet wheel mounted loosely upon the shaft against the spring casing; centrifugal pawls carried by the spring casing and adapted to fly out and engage the internal ratchet; a disk loosely mounted upon the shaft and spring pressed against the internal ratchet wheel; a compressed air supply; a valve casing, mounted below the shaft and having an inlet port at its bottom,

said inlet port being connected to the compressed air supply, and having an outlet pipe leading from its bottom, there being a blow-off port above the pipe; a slide valve in the valve casing, said slide valve having a port which connects said outlet pipe to the blow-off port when the valve is down; a pitman connecting the slide valve to the disk so that when the disk is rotated by the trolley wheel flying off the wire the slide valve is raised to admit the compressed air and when the disk is released the slide valve will move downwardly shutting off the compressed air and releasing the pressure; a pinion loosely mounted upon the shaft; a second disk rigid with the pinion; a second internal ratchet rigid with the winding drum; centrifugal pawls carried by the sec- 0nd disk, so that they Will fly out and engage is rotated to wind up the trolley rope and the internal ratchet; a piston; and a gear pull down the trolle rack connecting the piston to the pinion said outlet pipe being connected to the pis MARTIN L 1 ton so that when the sliding valve operates Witnesses:

compressed air is admitted to the piston and CLARENCE J. WILLIAMS, When the piston operates the Winding drum A. S. MAYNARD.

Copies of this patent may be obtained for five cents each, by addressing the Gommissioner of Patents,

Washington, D. G. 

